i use to work for a soudcrew, so i get pretty good deals. there out way in the east end though.
call l&m, also try sunshine sound (eglingtion w). i also think that dj depot has a location on queen at bathurst.
should be more than 50 - 75 bucks for 2 12's and a mixer (depending on model) for a couple of day during the week (w/e's are a different matter. it's been a long time since i had to rent equip though, so call to be sure.